Wound Closure Flashcards

1
Q

What are 4 classifications of wound closure?

A
  • Primary Closure
  • Delayed Primary Closure
  • Secondary Closure
  • Contraction and Epithelialization (Second Intention Healing)
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2
Q

Immediate closure of a wound is known as what?

A

Primary Closure

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3
Q

What are 2 types of wounds for which primary closure can be used?

A
  • Clean wounds

- Clean-contaminated wounds

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4
Q

A wound is considered clean-contaminated with what 3 factors?

A
  • Intact host defense mechanisms
  • Healthy wound
  • Appropriate antimicrobial treatment
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5
Q

How long is a wound left open for delayed primary closure?

A

2-5 days

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6
Q

Delayed primary closure is performed prior to what?

A

Prior to visible formation of granulation tissue.

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7
Q

What does delayed primary closure permit?

A

Repeated lavage and debridement to convert wound to clean-contaminated status appropriate for closure.

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8
Q

Wound closure after granulation tissue covers the wound is known as what?

A

Secondary closure

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9
Q

What are 2 types of wounds for which secondary closure is indicated?

A
  • Deep narrow wounds

- Wide wounds

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10
Q

How are deep narrow wounds closed?

A

Secondary closure by direct apposition over granulation tissue.

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11
Q

How are wide wounds closed?

A

Secondary closure by mobilizing skin edges and advancing over granulation tissue.

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12
Q

Contraction and epithelialization is also known as what?

A

Second intention healing

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13
Q

How should distal limbs wounds with damage less than or equal to 25% of the circumference heal?
25-33%?
33-50%?
Greater than 50%?

A
  • Should heal well
  • Most heal well
  • Will probably heal but with a wider scar
  • Consider reconstruction, extended healing time or inadequate healing
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14
Q

What are 3 causes of cessation of wound contraction?

A
  • Wound has healed
  • Tension in surrounding skin exceeds pull of myofibroblasts
  • Collagen deposition in chronic wound interferes with pull of myofibroblasts
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15
Q

What are 2 possible complications of second intention healing?

A
  • Circular wound

- Wound contracture

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16
Q

Where should closure lines be kept in relation to lines of tension?

A

Parallel

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17
Q

What are 3 reasons for making incision lines or wound closures on the trunk parallel to skin tension lines if possible?

A
  • Gape less
  • Heal faster
  • More aesthetic
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18
Q

When a wound has unequal sides, should sutures be closer on the shorter or longer side?

A

Closer on the shorter side.

19
Q

Retraction of skin edges after tissue is cut is known as what?

A

Primary contraction

20
Q

The ability to undermine skin is influenced by what 2 factors?
Why?

A
  • Species: differences in blood supply to skin

- Breed: some breeds have a lot more loose skin than others

21
Q

When undermining skin, you need to undermine below what muscle?

A

Cutaneous trunci muscle

22
Q

What are 2 reasons to use blunt dissection when undermining skin?

A
  • Preserves direct cutaneous vessels

- Less risk of post-operative hematoma

23
Q

What are 3 functions of walking sutures?

A
  • Advance skin over wound
  • Distribute tension
  • Decrease dead space
24
Q

Walking sutures distribute tension over the surface area of a wound rather than what happening?

A

Rather than being concentrated at primary suture line.

25
Q

What type of suture should be used for the walking suture technique?
How are these tied?

A
  • Monofilament absorbable suture

- Buried

26
Q

Walking sutures must engage what in order to have adequate holding power?

A

Must engage dermis and fascia.

27
Q

With walking sutures, what is done as the skin is advanced and stretched?

A

Sutures are tied as skin is advanced and stretched.

28
Q

Should first walking sutures be placed close to or further away from the wound?

A

Further away from the wound to start.

29
Q

What are 3 techniques of skin stretching that enhance local movement of skin?

A
  • Skin expanders
  • Skin stretching devices
  • Pre-suturing
30
Q

What are 3 techniques for enhancing local movement of skin that do not involve skin stretching?

A
  • Releasing incisions
  • Multiple punctate relaxing incisions
  • Adjustable horizontal mattress sutures
31
Q

Pre-suturing takes advantage of what 2 properties?

A
  • Mechanical creep

- Stress relaxation

32
Q

What is a type of pattern used for pre-suturing?

A

Mattress sutures with stents to distribute pressure on skin.

33
Q

Should the animal be sedated for pre-suturing?

A

Yes

34
Q

What should be done to the limb after pre-suturing?

What needs to be left exposed?

A
  • Bandage limb after applying

- Leave toes exposed

35
Q

When are pre-sutures placed?

A

Usually placed day before surgery (less than 24 hours)

36
Q

What can be done with suture lines in reference to pressure points?

A

Suture lines can be moved to avoid placement over pressure points.

37
Q

Multiple punctate relaxing incisions are also known as what?

A

Mesh releasing incisions

38
Q

What are 3 steps for making multiple punctate relaxing incisions?

A
  • Undermine skin
  • Place intradermal suture pattern
  • Make rows of staggered full-thickness incisions beginning 1 cm from edge while keeping tension on intradermal suture
39
Q

Is it better for incisions made for multiple punctate relaxing incisions to be short or long?

A

Short

40
Q

An adjustable horizontal mattress works best in what type of wound?
Why?

A
  • Wounds with established granulation tissue.

- Skin at edge of wound is thicker and holds suture better.

41
Q

What are 3 parts to an adjustable horizontal mattress?

A
  • Monofilament suture material
  • Buttons
  • Split-shot
42
Q

Where are the buttons and split-shot placed with an adjustable horizontal mattress?

A

Placed at one or both ends.

43
Q

What is done daily to the suture in an adjustable horizontal mattress?

A

Suture is tightened each day to enhance closure of the wound.